Home / 390,723.48-538,681.52-281,736.63

Finding the Fourth Proportional to 390,723.48, 538,681.52 and 281,736.63

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Solution

The fourth proportional to 390,723.48, 538,681.52 and 281,736.63 is: 388,423.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,723.48 : 538,681.52 = 281,736.63 : x
  2. Step 2: Convert to fraction form
    390,723.48/538,681.52 = 281,736.63/x
  3. Step 3: Cross multiply
    390,723.48x = 538,681.52 × 281,736.63
  4. Step 4: Simplify right side
    390,723.48x = 151,766,316,792.42
  5. Step 5: Solve for x
    x = 151,766,316,792.42/390,723.48
  6. Step 6: Final answer
    x = 388,423.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.